Lathe for turning polygonal forms



(No Model.) 2 Sheets-Sheet 1. F. HANSON.

LATHE FOR TURNING POLYGONAL FORMS.

N0. 303,639. Patented Aug. 19, 1884.

, W Ill/VE/VTOR ag I r Afforney WITNESSES N, PEYERS. Pbuwlithagnphar.wumnm u C.

2 Sheets-Sheet 2.

(No Model.)

PIHANSON.

LATHE FOR TURNING POLYGONAL FORMS.

No. 303,639. Patented Aug. 19, 1884.

' WITNESSES J? 06 a -WM dz N rn' terns Aren't TFFICE.

FREEMAN HANSON, OF BAR MILLS, ASSI GNOR TO llORATlO \V. PALMER, OFHOLLIS, MAINE.

LATHE. FOR TURNING POLYGONAL FORMS.

ESPECIFICATION forming part of Letters Patent No. 303,639, dated August19, 1884.

Application filed November 15, lFSIi. (No model.)

1'0 all whom it rmty concern:

Be it known that 1', Fnnnnin Hanson, a citizen of the United States,residing at Bar Mills, in the county of York and State of Maine,

5 have invented certain new and useful improvements in Turning-Machines,of which the following is a specification, reference being had thereinto the accompanying drawings.

Figure l is a perspective view, looking to- Ie ward the fore part of myimproved wood'turning machine. Fig. 2 is a vertical longitudinal sectionthrough the maehine,i11dicated by dotted lines on Fig. 1. Fig. 3 is adetail in perspective of ,the pivoted yielding bearing I 5 for the boardto be cut, showing the latter in position. Fig. 4 is a cross section ofthe yield ing bearing.

My invention relates to machinery for turning and cutting wood; and itconsists, mainly,

in a rotating shaft applied to a reciprocating carriage, and havingcutters applied to it, in combination with centering and holding stocksfor the wood to be out, which stocks have their bearings inverticallymovable sashes, as will be 2 hereinafter explained; also, in apivoted yielding support for the wood while being cut or turnethas willbe fully understood from the following description, when taken in.connec tion with the annexed drawings.

0 A designates the main frame of the machine,

and 13 are vertical guideways for a reetilin ear reciprocating carriage,B, adapted to work between said guideways, and having on its upper end ahorizontal transverse cutter-shaft, O, 3 5 to which a number of suitablecutters, O, are applied spirally, as shown in Fig. 1. On the ends of thecutter-shafts are keyed pulleys a a, around which belts pass that areapplied around pulleys b b, which are keyed on a shaft, 0 D, thatreceives rotation from the main drivingshaft E by means of a belt whichis passed around pulleys e c. I thus transmit rotation to thecutter-shaft from the main drivingshaft. On the main shaft is k eyed apinion spurwheel, f, which engages with the teeth of a large spuravheel,F, keyed 011 a shaft, F. On the end of this shaft F are keyedcrank-wheels F which transmit reciprocating motion to the carriage B bymeans of pitman-rods F G designates a horizontally-movab1e carriage,which is composed of longitudinal and confined between said chucks andcentering- 6.

transverse bcaringbars, and which is kept in place by suitable guidesapplied to the top rails of the main frame A. Two of the bars of ihecarriage G afford bearings for a rotating 5 chuck. g, and the other twoof the bearing-bars are screw-tapped to receive a centering-screw, g,bearing on its end a crank-handle. 'The wooden bolt or bar H to be cutor turned is screw, as shown in Fig. 1. On the outer end of thechuck-spindle is keyed a ratchet-wheel, 71, having any desired number ofteeth, with which-a pawl, 45, engages, that is pivoted to a vibratingarm, j, playing loosely on the end of the chuck-spindle. The pawlarm Jis connected to a fixed piece of the main frame A by a pivoted rod, J.Now, it is obvious that at every forward stroke of the carriage-sash Gthe bolt or bar H which is being acted on by the cutters will receivepart of a revolution. Thus during the operation of the machine newsurfaces to be cut will be constantly presented to the rotating cuttersO.

K designates a rock-shaft which has its bear- 7 5 .ings in the frame A,and from which project arms 76, the upper ends of which are looselyconnectedto the carriage G. From the middle of the length of therock-shaft K extends a lever, K, which is struck by a tappet-pin, 2, Sofixed to the face of the large spur-wheel F, at every revolution of thiswheel, and causes the carriage G to recede from the cutters C. The

carriage G is moved forward, to present the wood to be turned to thecutters, by means of aspring, S. (Shown in Fig. 2.) Instead of thespring S, weights may be substituted. In practice I shall make thetappet-pin t radially adjustable, by which means the throw of the levers K, and consequently the carriage G, can be regulated, and theamount of rotation of the bolt or bar H. controlled.

V designates a horizontal transverse presslire-bar, which is pivoted atea to the carriage G, and provided with a weight, \V. The forward lip ofthe bar V is arranged beneath the stuff to be turned, and is heldagainst it by the action of the weight XV. Instead of the weight W, aspring may be employed, the tension of which may be adjustable. thepressurebar V is to afford a yielding bearing or support for the stuffbeing turned, and

Now, the object of thus in a great measure relieving the end supports, 9g, from undue strain. This bar V serves to hold the wood or bolt steadyand prevent it from breaking or splintering while being cut or turned.

Having described my invcntion,what I claim as new, and desire to secureby Letters Patent, 1s-

1. Ina machine for turning or cutting wood, the combination, with themain frame of a vertically-rectilinear reciprocating carriage bearing onits forward end a rotating shaft having a series of cutters applied toit, and a horizontally-reciprocating carriage bearing a rotating chuckand a centering device, of the bolt or bar to be cut, substantially asdescribed.

2. The combination of a reciprocating cutter-carrying carriage havingrotating cutters applied to it with a horizontally-movable carriageadapted to hold work to be cut, and a ratchet and pawl for automaticallyrotating the work, substantially as described.

3. The combination of a carriage carrying rotary cutters, pitman-rodconnection of this carriage with crank-wheels 011 a shaft, F, thespur-wheel F on said shaft, the adjustable tappet on said shaft, thelever K, its rocking frame acted 011 by a spring or its equivalent,

and the horizontally-moval)le carriage adapted for carrying the wood tobe cut and feeding the same up to the cutters, all constructed andadapted to .operate substantially in the manner and for the purposesdescribed.

4. In a machine for turning or cutting wood, a rectilinear reciprocatingcarriage having on one end a rotating cutter-shaft, pulleys on the endof this shaft, pulleys on the ends of shaft D, their connecting-belts,pulleys e on shalt D, pulleys e on the main driving-shaft, thebeltconnection therefor,pinion-wheel f on the main shaft, a largespur-wheel, F, on shaft F, crankwheels on shaft F, and pitman-rodconnections with said carriage, substantially as de scribed.

5. The combination, with the checks of the carriage G and thecentering-screw, and the ro tating chuck adapted to hold a bolt to beturned, of the broad pressure-blade V, pivoted to two of the cheeks ofsaid carriage, and provided with a weight, W, substantially asdescribed.

6. The combination,with an elongated gravitating pressureplate which ispivoted to the side walls, of a carriage bearing a chuck fora bolt orblock, substantially as described.

In testimony whereof I allix my signature in presence of two witnesses.

FREEMAN HANSON.

Vitnesses:

JOHN I. PERRY, A. M. AUSTIN.

